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Subject Term
- USA (United States of America; North America)[remove]4
- 4-H1
- FFA (formerly Future Farmers of America)1
- audiovisual media1
- careers1
- change1
- children1
- communication analysis1
- communication behavior1
- communication research1
- diversity1
- education1
- education programs1
- education research1
- extension agents1
- extension communication1
- extension education1
- extension programs1
- farmers1
- historical research1